2003 envoy 4.2L....replaced fan clutch/wiring harness. APP assembly. getting code P1217 5v reference. purchased a A/C delco thottle position sensor plug/pigtail. . any guidance on where to start or how to check for the voltage mismatch with a VOM? dont want to replace the entire throttle body without checking the wiring issues first. any help would be GREATLY appreciated. Diagrams? shadow puppets? HELP PLEASE!!!!!!